Method of operating an air supplied type coating booth

Abstract

A method of operating an air-supplied type coating booth in which conditioned air is enforced from an air supply blower downwardly to the inside of a coating booth and then discharged to the beneath of the booth floor by an exhaust blower, in which the booth operation is stopped after memorizing the balanced flow rates for the supply blower and the exhaust blowers kept just before the completion of the booth operation, and the supply blower and the exhaust blower are automatically set to the above-mentioned balanced flow rates respectively upon re-starting the booth operation again. Balanced and stable booth operation where no air streams flow into or out of the inlet and the exit can be attained rapidly at the start of the booth operation.

What is claimed is: 
     
       1. A method of operating an air-supplied type coating booth in which conditioned air supplied from an air supply blower to a plenum chamber is enforced downwardly to the inside of a tunnel-shaped coating booth and the air thus enforced in the coating booth is drawn to discharge together with coating mists, evaporated organic solvents and the likes by an exhaust blower to the beneath of a floor, wherein the method includes: a step of ending the operation of the coating booth comprising memorizing the flow rate of air supplied from the air supply blower and the flow rate of exhaust air discharged from the exhaust blower attained just before the completion of the booth operation where the flow rate of the supplied air and the flow rate of the exhaust air have been balanced, and then stopping the operation for the air supply blower and the air exhaust blower and   a step of re-starting the operation of the coating booth comprising automatically setting the flow rate of air supplied from the supply blower and the flow rate of exhaust air discharged from the exhaust blower to the flow rate of the supplied air and to the flow rate of the exhaust air memorized respectively just before the completion of the booth operation upon re-starting the booth operation again.   
     
     
       2. A method of operating an air-supplied type coating booth as defined in claim 1, wherein the flow rate for the air supplied from the air supply blower and that for the exhaust air discharged from the exhaust blower are memorized before the completion of the booth operation and the air supply blower and the exhaust blower are operated in accordance with the memorized flow rate upon re-starting of the booth operation in a program-controlled manner respectively.